Fig. 4

Feature importance ranking plot for RSF in mortality. The entire dataset was split into training data (80%) and test data (20%). We set ntrees to 1,000 and obtained a C-index to evaluate model performance in the test data: 0.83 for all-cause mortality, 0.85 for CVD mortality, 0.98 for cancer mortality, and 0.79 for other mortality. VIMP: Variable importance